Door-lock



E. H. omEN.A

DOOR LOCK.

APPMCATION FILED DEC.9| 1912.

Patented May 18, 1920.

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E. H. OBRIEN.

DOOR LOCK.

APPLICATION FILED DEc.9,1912.

Patented May 18, 1920.

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EDMUND HALE OBRIEN, OIE KANSAS CITY, MISSOURI.V

:Doon-Loox.

Specification of Letters Patent.

Patented May 1s, 1920.

Application led- December 9, 1912. Serial No. 735,677. f

i To all whom t may concern:

Be it known that I, EDMUND HALE OBRIEN, atcitizen of the United States,re-

siding at Kansas City, in thev county of Jackson and State of Missouri,have invented certain new and useful Improvements in Door-Locks, ofwhich the following is a specification. g

This invention relates to locks for motor car doors and the like.Heretofore in all locks, as far as I am aware, the latch bolts have beenretracted or thrown to inoperative position by striking against thesocket plates secured to the door jambs and through such contact thepaint or-enamel finish of the socket plates, or of the jambs or otherparts adjacent thereto, is soon scratched or dislodged.

The object of this invention is to produce a lock in which the boltafter being thrown to inoperative position to permit the door beingopened, remains in such position until the door is fully closed and isthen thrown to operative position and therefore cannot be instrumentalin scratching or otherwise defacing any part of the socket plate orjamb.

. A further object is to produce a doorlock in which the shock or jarincident to the arrest of the door as it is closed is cushioned andpartially or wholly removed from the socket plate which receives thebolt, or the jamb which carries said plate.

With theseobjects in view the invention consists 'in certain novel andpeculiar features of constructionv and organization as hereinafterdescribed andclaimed; and in order that it may be fully understoodreference is to be had to the accompanying drawings, in whichf Figure 1,is a fragmentary side elevation i of a motor car in which the door isl,broken away to disclose a lock embodying my in vention. .y

Fig. 2, is a horizontal section of the car,

to show the lock in plan'view.

- Fig. 3, is a view of the lock with the face A plate removed, and withthe bolt advanced,

as when the door is closed.

Fig. 4, is a similar view with the bolt retracted and the door stillclosed.

Fig. 5, is a vertical section taken on the line V-V of Fig. 4. Y

Fig. 6, is a detail view of a lever forming part of the lock. l

Fig'. 7 is a detail trigger of the lock.

Fig. 8, is a detail perspective view of a part of a bar for impartingendwise movement to the trigger.

Fig. 9, is a detail perspective View of a spring for holding the triggeryieldingly elevated.

Fig. 10, is a detail perspective View of a slide plate forming a part ofthe lock.

In the saidydrawings, 1 is a lock casing and 2 the removable face platethereof. 3 is the bolt, thefhead of the same fitting in an opening inthe frontA wall of the casing, and provided in its upper edge with anotch 5.

The shank o-f the bolt is provided with a longitudinal slot 6, engaginga guide pin 7 rigid with the casing and projecting laterally anddownwardly respectively, from the shank are pins 8 and 9,V the latterbeing connected by a retractile springl() with a pin 11 rigid with thecasing, the function of the spring being to advance the bolt at theproper time.

To lock the bolt in its retracted position, as shown in Fig. 4, a dog ortumbler 12 is mounted pivotally within the casing, and is provided witha depending tooth 13 for engagement with the notch 5, the dog or tumblerbeing held pressed yieldingly toward the bolt by a spring 14, which iscoiled around the pivot pin'15 of the dog, and bears at its ends uponthe latter and against the front end wall of the casing. For the purposeof retracting the bolt, a lever 16 `is suspended within the casing frompivot 17, and at its lower end bears against the forward. side of pin 8of the bolt, and is connected by a retractile spring 18 to the rear endof the wall of the casing; said spring being of sufficient strength toovercome the resistance of spring 10 and withdraw the bolt 3, when thelatter is not held advanced or projected by a preponderating power.

The lever is cut awayv at 19, to provide a perspectivel'view of the.shoulder 20, and projecting through the cut rear end with a verticalslot 25, receiving a pin 26, projecting laterally from the head of aslide bar 27, extending into the casing through the rear end wallthereof, and to Secured to the lower edge of the head of the slide baris a spring 29, the'sprin'g end 30 o the same underlying the trigger 21and constantly tending to elevate the front end thereof.

Pivoted within the casing on pivot 31 is a bell crank lever 32 andinterposed between said lever and the Jfaceplate of the casing is aslide plate 33, having a stem 34, projecting slidinglyV through the topof the casing. This plate is also provided with a vertical slot 35receiving pivot 31 and a shoulder 36 which rests upon the upper arm ofthe said bell crank lever, so that when the slide plate is presseddownward, it shall cause the bell crank lever to exert downward pressureon the trigger 21.

Then the bolt occupies its advanced or operative position and is engagedwith the socket piece 46, as shown in Fig. 3, the trigger is raised andprevents backward swinging lmovement of lever 16 and the consequentwithdrawal of the bolt, and while the trigger is thus advanced its frontor free end is held elevated through pressure of its shoulder 22 onshoulder 20 of the lever 16, and the upward pressure of spring' 29. A

The slide bar 27 is secured in a socket 37 fastened on the Afront end ofa rod 38, which extends for the full width of the car door 39, and whenthe latter'is closed or nearly closed, engages a wear plate 40 securedto the hinge jamb 41, through the pressure of.

i a spring 42 interposed between the socket 37 and the casing 1, and .inthis connection it will be noted that for all practical purposes rods 27and 38 are one, but that for con? venience in'assembling, they arepreferably made in sections, as shown in `Fig. 3.

For imparting downward movement to the slide plate 33, a push rod 43-extending up through the door, is provided at its lower "z end with asocket 44 receiving the upper end of the stem of the slide plate, and atits upper end is provid/ed witha head or button 45 projecting slightlybeyond the upper edge then swing lever 16 rearwardly and as said of thedoor for convenient operation by a person seated in the car.

Assuming that the bolt is advanced and that pressure is applied on thepush rod, the following actions occur ;-'Ilhe plate 33 slides downwardand its shoulder 36 rocks the bell crank and causes the latter to swingvthe trigger downward until tripped from engagement with lever 16.Spring 18 will spring is of greater power than spring 10,

it withdraws they bolt by rearward pressure on pin 8, and in withdrawingthe bolt, stretches or tensions spring 10.

As the lever 16 swings rearwardly and effects the withdrawal of thebolt, dog 12 swings downward until its tooth is in the path of -rearwardmovement of the bolt head so that in the rearward movement of thelatter, the dog is? pushed upward, and when its tooth registers withnotch 5, and it drops down and locks the bolt in its withdrawn orretracted position, as shown in Fig. 4, it being noted that thiswithdrawal of the bolt occurs without any change of position on the partof the bar 27, which it willbe noted is held advanced against theresistance of spring 42 becausev the rear end of bar 38 bears againstthe wear plate 40.

As the door is opened the )spring 42 imparts rearward movement to bars27 and 38, and hence to the trigger 21, and as thelatter is withdrawn aVsuiicient distance for its shoulder 22 to clear shoulder 20 of thelever, the spring 29 raises the front end of the trigger and holds itelevated.

IIpon the reclosing of the door, the rear end of rod 38 engages and ispushed for` ward by the wear plate 40, this adjustment of said rodbeginning just before and ending as the door is fully closed, and insuch movement spring 42 is compressed and the trigger is advanced sothat through its pressure on lever 16, the same shall be swung forwardand trip the dog from engagement with the bolt.

The tripping of the dog from engagement with the bolt permits the spring10 to force the bolt into interlocked engagement with the socket plate46, it being understood that t-he parts are so proportioned that thetooth of the dog is not wholly withdrawn from the notch 5, until thedoor is Jfully closed and the bolt is in perfect aline-ment with thesocket plate.

From the above description it will be apparent that I have produced adoor lock em- 1. In a lock, the combination of a casing,

a bolt therein, means holding the bolt in inoperative position, means totrip the boltholding means, means to throw the bolt to operativeposition as the holding means is tripped, and a single means to returnthe tripping means to original position and the bolt to inoperativeposition.

2. In a door lock, the combination of a casing, a bolt therein, apivoted dog holding the bolt in inoperative position, means to trip saiddog, means tothrow the bolt to operative position when the dog istripped,

, holding means to trip the same, and a spring A to advance or throw thebolt to operative inoperative position, a lever in the casing positionwhen said holding-means is tripped.

Ll. In a lock, the combination of a casing, a bolt therein, meansholding the bolt in inoperative position, a lever in the casing to tripthe bolt-holding means, in its advance movement and throw the bolt toinoperative position in its reverse movement, a trigger in the casing toeffect the advance movement of the lever and the consequent tripping ofthebolt holding means, and a spring to advance the bolt when it isreleased.

5. In a lock, the combination of a casing, a bolt therein, means holdingthe bolt in inoperative position, a lever in the casing to trip the boltholding means, in' its advance movement, and throw Vthe -bolttoinoperative position in its reverse movement, a trigger in the casingto effect the advance movement of the lever and the consequent trippingof the bolt holding means, a spring to advance the bolt when it isreleased, manually-operable means for tripping the trigger fromengagement with the lever, and .a spring to swing the lever back to itsoriginal position and-thereby effect the return of the bolt to itsinoperative position'.

6. In a lock, the combination of a`casing, a bolt therein, means holdingthe bolt in to trip the bolt holding means in its advance movement, andthrow the bolt to inoperative position in its reverse movement, atrigger in the casing to effect the advance movement of the lever andthe consequent tripping'of the bolt holding means, a spring to advancethe bolt when it is released, manually-operable means for tripping thetrigger from engagement with the lever, a spring to swing the lever backto its original position and thereby effect the return of the bolt ,toits inoperative position, and means to restore the trigger to itsinitial position.

7. In a lock, the combination of a casing, a bolt therein, means forholding the bolt in inoperative position, a lever in the casing to tripthe bolt holding means in its advance movement, and throw the bolt toinoperative position in its reverse movement, a trigger in the casing toeffect the advance movement of the lever and the consequent tripping ofthe bolt holding means, a spring to advance the bolt when it isreleased, manually-operable means for tripping the trigger fromengagement with the lever, a spring to swing the lever back to itsoriginal position and thereby effect the return-of the bolt to itsinoperative position, means to withdraw the trigger from its advancedposition, and yielding means to restore its free end tothe position itoccupied prior to being tripped from engagement with said lever.

8. A lock comprising. a bolt, resilient means for shooting and drawingthe bolt, and means normally projected against the j amb at the hingededge of the door for controlling said resilient means in projecting thebolt. A

9. Thel combination with a door frame and a door hinged thereto, ofmeans normally holding the door open, means forlocking the door to theframe, means for interconnecting and disconnecting sald two means, andmeans for automatically u nlocking the door from the frame when said twomeans are disconnected.

10. A door latch, comprising a door locking section, a door openingsection, releasable means for interconnecting said sectionsautomatically, and means for retracting the door locking section whensaid sections are disconnected from each other.

11. The combination With a door. frame and a door hinged thereto, of alaterally sliding sectional bolt member mounted on the door andextending across the same, said A normally retracted bolt, and aspringpressed door-opening bar for causing protraction of the boltautomatically ,l on the closing of the door. f

In testimony whereot1 I aix my signature in the presence of twowitnesses.

EDMUND 'HALE oBRIEN,

Witnesses.:

HELEN C. Ronenns, G. THoRrE.

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